It is an interesting question because there are various forces acting in different directions. I suspect there are many, the folks who don't attend the parades in leather and rubber, who would feel intense pressure to avoid this school like the plague. On the other hand there would seem to be inherent forces within that sees no problem with the behavior.
And then there is the protectiveness that every parent feels. I suspect children of homosexual couples would attend the school at only slightly higher rates than their heterosexual counterparts in that geographical location.
I suspect you are probably right.